Oregon -- who made it to the national championship game in 2010 -- dropped nine spots to No. 13 after losing 40-27 on Saturday night. The other participant of that game, defending national champion Auburn, dropped out of the rankings altogether despite winning its game on Saturday.

Auburn narrowly defeated Utah State 42-38 and fell from its spot at No. 23 out of the Top 25. According to the Associated Press, Auburn becomes just the second defending champion since 1950 to fall out of the rankings after the first week of the season.

Notre Dame, Georgia, and Southern California also dropped out of the rankings after the first week of games. Notre Dame, initially ranked No. 16, lost to South Florida 23-20; Georgia lost to No. 4 Boise State 35-21; and USC dropped out despite defeating Minnesota 19-17.